GeForce GT 340 1GB vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which comes with core speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 memory. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon R9 380 4G		190 Watts
	Difference: 121 Watts (175%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G will be 235% faster than the GeForce GT 340 1GB in general, because of its higher data rate. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 128000 (235%)

Texel Rate

The Radeon R9 380 4G should be a lot (more or less 517%) better at AF than the GeForce GT 340 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 91040 (517%)

Pixel Rate

The Radeon R9 380 4G is quite a bit (about 605%) faster with regards to FSAA than the GeForce GT 340 1GB, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 26640 (605%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.